Ground Engaging Tool Lock Mechanism for Secure Retention
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Solution Overview
Problem
Existing retainer systems for ground engaging tools on earth-working machines are inefficient in securely attaching and detaching tools, leading to wear and damage, and often require complex configurations and additional parts.
Innovation Solution
A ground engaging tool assembly with a lock mechanism featuring a C-shaped skirt and compressible detent projections that securely attach and detach from a support structure using a rotatable lock system with detent recesses and projections, simplifying the attachment and detachment process while providing secure retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotating lock mechanism with slot and post is used to securely attach ground engaging tools, then the retention reliability is improved, but the device complexity increases due to multiple components (lock, bushing, cavity, post)
Solution Approach 1:
The patent combines the lock mechanism components into a more integrated structure. The lock body integrates the slot, detent recesses, and locking features into a single component that attaches directly to the ground engaging tool, eliminating the need for separate retainer bushings and lock cavities. This merging reduces the number of parts while maintaining the secure retention function.
Solution Approach 2:
The lock mechanism is designed to perform multiple functions with a single component structure. The lock body simultaneously provides the slot for post insertion, detent recesses for securing the post, and structural support for the attachment. This multi-functionality reduces overall device complexity while maintaining reliability.
2Reliability
If existing retainer systems with multiple components are used, then secure attachment is achieved, but the ease of manufacture deteriorates due to customized retainer systems requiring precise assembly
Solution Approach 1:
By merging multiple retainer system components into an integrated lock mechanism, the patent simplifies the manufacturing process. Fewer separate parts mean fewer assembly steps, reduced precision requirements for mating surfaces, and easier quality control. The consolidated structure can be manufactured as a single piece or pre-assembled unit, improving ease of manufacture while maintaining attachment security.
3Reliability
If complex retainer systems are used to prevent wear and damage, then the reliability of tool retention is improved, but the loss of time increases due to complicated attachment and detachment procedures
Solution Approach 1:
The lock mechanism is segmented into distinct functional features (slot, detent recesses, locking surfaces) that work together in a simple sequence. This segmentation allows for straightforward attachment by inserting the post into the slot and engaging the detent recesses, and equally simple detachment by reversing the process. The segmented design maintains reliability while reducing the time required for tool changes.
4Reliability
If additional parts are included in the retainer system to ensure secure attachment, then the retention reliability is improved, but the device complexity and quantity of parts increases
Solution Approach 1:
The patent merges multiple retention functions into a single lock component structure. The lock body incorporates the slot for post reception, detent recesses for securing, and structural support elements that would otherwise require separate parts. This consolidation reduces the quantity of parts while maintaining or improving attachment reliability through integrated design.
Data Source
AI summary
A ground engaging tool includes an interior surface. The tool may also have an exterior surface defining a front edge of the tool. In addition, the tool may have a rear surface substantially opposite the front edge. The rear surface may connect the interior surface to the exterior surface. The tool may also have a lock opening surface. The lock opening surface may define a lock opening extending from the interior surface, through the tool, to the exterior surface. The lock opening surface may have a generally circular inner portion adjacent the interior surface. The inner portion may define a groove in the tool positioned circumferentially around the lock opening. In addition, the inner portion may define at least one detent recess in the tool along the groove. The lock opening surface may also have a generally circular outer portion adjacent the exterior surface.